Been searching for a solution to this but to no avail.. :(
What i would like to have happen is when a certain product is added to cart, a discount of 50% becomes applicable to all other products in the store. However the triggering product shouldn't have its price changed i.e. no discount.
Is this even possible?
Sounds like something Awocoupons could handle - ask the developer. http://awodev.com/products/joomla/awocoupon